Misframe-indicator for moving-picture films



D. H. GIBBS. IvIIsFRAI/I'' INDICATOR FOR MOVING PICTURE FILI/Is. APPLICATION FILED JULY 29,1919. 1,334,028, PfIIenIed Mar. 16,1920.

UNI'rnn sra'rns PATENT", orFIonQ DWIGHT n. eines, or sen rnenorsoo,oaLIroItNI,

MISERAlVi-INDIGAIYOR FR NIOVINGf-IICTUB-E' FILMS.L

Lesions.

ed new framelndicators for IiLIoving-icture Films, of which the following is a specification.

The object of the present intention is to provide a device for rapidly ascertaining the location or misfit-aine in a moving picture film. The term misframe is applied to an imperfect juncture of two portions of such a film, resul lng in a series of pictures shown improperly on a screen, in that the bottoinor top of the picture appears in a mediate position on the screen, so that portions of two pictures appear on the saine screen. It a commonV experience that films are occasionally so shown, to the annoyance of the spectators. Consequently, it is customary to inspect these films previous to projection upon a screen.

it present, Athis is done by an inspector' observing the film when rewinding from the used reel on to an empty reel and noticing wiether the line of demarcation between two successive traineef7 as they are termed, that is, portions of the film from which single pictures are projected, registers properly with the sprocket holes in the film.

`But this is a difficult task, and, Inoveover, should a lack of registry be detected, it is a long and tedious process to determine when registry of the frames ceases to be correct.

My device is intended 'to overcome this difficulty.

In the accompanying drawing, Figure 1 is side Vview showing my device in use; 2 is a plan view of the device; Fig. is a developed View of the circumference of a wheel of said device; Fig. e is a section of a roller.

Referring to the drawing, 1 indicates a table upon which are supported a shaft 2 for rotatably supporting a wheel 3 on to which a film el has been wound while projecting the pictures thereon and a shaft, not shown, supporting an empty wheel 7 upon which the film is to be rewound.

Between said wheels 3 and 7 is placed my improved indicating device. It consists of a support 8 having at its lower end a base 9 resting upon the table 1. and having` a portion curved around the edge of the table,

Specification of Letters atent. E )zgt'tented llll'. 16, 1920.

Application filed July 29, .1.919.

Serial No. 314,03).

and attached theretoI by a thumbscrew l0.

Said support 8 is forked at its upper end,

vasshown at 11, and supports an axle 12 upon which is rotatabiy mounted .a wheel 13, which I term an inspection wheel. Said wheel. 13 is" slightly wider than the film which is passed over it, and is t circumference equal in length to 18 frames of the film. Its circumference is marked with 1S equidistant transverse lines 1l eritending entirely across the circumference, and provided, between each pair of adjacent lines, with two series of pins 16, four in each series, extending about one-sixteenth of an inch from the circumference and of a diameter the exact width ofthe sprocket holes 17' in the film, there being four sprocket holes in each side of each frame of the film. The lines la can be marked on the inspection wheel in any desired manner, preferably by being indented into said wheel. The wheel being wider than the film, the ends of the lines appear outside the edges of theffilm and should coincide with the black lines 15 of demarcation between the adjacent frames of the film. If the operator carefully inspects either side of the film while rewinding it, he will immediately detect any lack of registry between corresponding ends of said lines and the lines of demarcation, and it is an easy matter then to turn back the lihn to such point where the lack of registry first appears. In order to insure the film being held upon the wheel, I provide two spaced rollers 18, the reduced ends or shafts 19 of which are inserted in holes in -end portions 21 of a metal frame 22, one side of which is hinged, as shown at 23, to a sheet metal support 24, riveted to one side f the forked upper end of the support 8. Flat springs 26 secured to said support Lf press down on said metal frame 22, and thus press said rollers on to lthe film as it is passing over for inspection, and by holding the portions of the film between said rollers, facilitates the detection of any lack of registry between the lines 14 and 15.

The rollers are provided at each end with somewhat large wheels 28 preferably integral therewith. which engage the ends of .the inspection wheel 13, and maintain the film, and other moving parts, in proper relation to one another.

I claim 1. In means for detecting film misframes, a wheel wider'than the film and over which said film travels, the circumference el said.

Wheel being the length of an exact multiple of the length of a frame on the film, and

means on the'circumference of said when.

s aced a art the lenOth of a fra-n e ior rea'- h 7 1..,

istering with uniformly spaced marks which appear on and extend transversely across the film. s s

Q. ln means for detecting `ln1 misti-ames,

a Wheel Wider than the film and .Oif'er Which said film travels, the circumference ol' said Wheel being the length of an exact multipleof the length of a frame on the film, and marks extending transversely 0n the circum-A ference' of said Wheel, and being lspaced apart the length of a frame, so as to register with the uniformly spaced transverse marks on the film.

3. Means for detecting film misi'raines:

comprising a Wheel Wider than the lilm and 20 Wheel, and marks extending transversely on 25 the circumference of the Wheela spaced apart thelengtli of a frame of the lilm and adapted to aline with the nniiorn'ily spacedinarks extending transversely across the lilm between the frames, Ysaid Wheel marks being 30 Vvisible upon opposite vsides of the lilm.

D. H. GIBBS. 

